Volume-regulator gauge



March 30 1926. 1,578,440

P. HOFFMAN VOLUME REGULATOR GAUGE Filed 13. 8. 1925 .7 INVENTOR V 4 Paul Hbfima'a/ ms Mi rani To all whom alt may cancer/"n:

Patented Mar. 30, 1926 UNITED: STATES PATENT OFFIC PAUL HOE M N, 0E EAST ORANGE, NEW JERSEY, assienon' To IrreERsoEn-Eann COMPANY, oEJ nsEY our, NEW JERSEY, A CORPORATION OF NEW JE sEY,

VOLUME-REGULATOR GAUGE.

Application filed September 8,1923; Serial Ira-senses. l

Be it known that I, PAUL. HOFFMAN, a citizen of. the United States, and a resident of East Orange,vcounty of Essex, and State of New Jersey, have invented acertain Volume-Regulator Gauge, of which the following is aspecification accompan ed by drawings. a r f r This invention relates to a volume regulator gauge fora gas compressor, pump erably from thatwhichwould be delivered under standard conditions of air, and becomes necessaryto increase or diminish the speed of the machine inorder that the proper .weightof oxygen may be delivered. Fora given volume of air, the weight of oxygen varies accordin to the barometric conditions, and accordingl the speed of the machine must be regu ated in accordance with'the changes in barometric conditions, a I Theobjects of the present invention are to enable the fluid volume supplied to a pump or blower tobe determined for different barometric conditions in an improved and simplified manner, in order that the weight of oxygen delivered to a blast furnace or wherever required, may be maintained constant.

Another object of the invention is to produce a gauge which may be pivotally adjusted for changes in barometric conditions, to indicate'the fluid volume supplied to the blower. 1

To these ends the: invention consists of the features of'construction andcombinations of elements substantially as hereinafter fully shown in Figure described and claimed ingthis specification,

andshown in the accompanyingdrawings,

in which- Figure 1 constant volume regulator gauge connected to a blower,

a Figure 2 is a side elevation-of the I 1 with partof the, base removed, and f Figure 3.] is "a horizontal detail sectional view of the adjusting means for the scale frame, taken on line 3-3 of Figure 2, lookingainj the direction of the arrow.

is a vertical sectionalview of a eferring to the drawings, the compressor A is shown mounted in the usual manner on the foundation B,,-'the floor line C-ibein'g shown for purposes ofillustration. The in take conduit D of the; compressor is prefers ably provided with the restricted portioniin the formof a Venturi tube E, in which the velocity ofthe incomingfiuid, such as air', is increased, roducing sub-atmospheric pressure, as a enturi tube-has been found to be a;convenient device-for "use in connec tion with a regulator gauge of the formde scribed. i

An up-right support or frame F, having a base G" and aplate H, is shown mounted on the floor, line j flhe plate H and base G zireishown'integral with the support F, but it is to be, understood that these may be separate parts,'if sodesire'da Mounted (onthe base G is a reservoir J, preferably in the formof'an inverted iglasscup, which is held in position on the base by a yoke K andcoil spring L. The oke K is secured to the base G as by a bolt and the coilspring D has on'ejvend bearingagainst a seat P, which is spaced from the reservoir.J by a washer Q of felt orothers-i ritable ma terial iThe reservoir J communicates with'the large diameter of the intake ,D, through the up-right tube R, passage S in the base G, and artube T, so that the air from the intake D ofthe a compressor A may, pass into and out of the reservoir J. v

An up-right tube U, preferably of glass,

is secured at its lower end in the base G by a gland nut V and packing VV.- T-herupper portion of the tube UisbenuasatX', andis secured in the plate H by a gland nut Y and packing'Z, and is in communication with the restricted portion E of the intake D by the by variations inthe difference infpressure a bers.

' tated byv the knurled head 9', so that the between the two-points in theintake Dto which the tubes T and a are connected.

An'indicating member, in this instance,"

comprises a frame 0 having an'insertd in the form of a flat plate, preferably of celluloid, which is calibrated in fluid volumes of cubic-feet per minute under standard condi ti'ons'of air, as indicated bythe'large num V The frame is pi'votally mounted on the base G by the s'crewbolt e, and is in this instance, 'arranged in front of the tube U.

The insert however, may be of brass or other suitable metal, and may be placed to the rear of the tube U1 The height of the liquid column ii'lthe tube U cooperates with the fluid volume scale on the insert (Z to indicate] the ,volume of' air flowing through the intake D. x i In order to, adjust the gauge forchanges in barometric conditions, the frame 0 is formed in this instance with an extension 7 having a pointer: g and the whole frame and pointer are adapted to be rocked about the pivot e bythe screw'h, which may be ropointer moves substantially horizontally. shown in Figure3, the frame extens on is formed with the guide projections lcfbe-o tween which located a nuto threaded on the screw it. By rotating the knurled head ion the screw in one direction or the other,the nut 0" will travel' horizontally along the screw in the direction desired in OrderQ-to rock the frame, 0' and move the pointer, g

alonga temperature scale 79 to accord with the existing temperature. I As 1 the nut 0 moves along the screw h,,relative sliding movement is permitted between the nut" and guide projections A temperature scale memberor slide glhavin'g the temperature scale 7) is ladapted to' slide in, the plate and may ,bemoved horizontally by a screw 1" which has aknurled head s, The slide 9 is provided with an indicator 6 adapted to cooperate with a barometri'cally calibrated scale memb-era, integral with the plate H, for adjustment in accordance with barometric pressures. f 1 j t In the operation of thejgauge above described, let it be assumed thatthe thermometer reading is 'degrees F. and the barometerreading is 80 inches, then the screw 1" would be rotated to move the slide 9 until the indicator tis opposite the 30 mark on the barometric scale u, and the screw it is rotated to bringthe pointer g opposite the 70 mark on the temperature scale 7); The fluid cubic feet per minute is correct for delivering the proper weight of oxygen for the purpose required, and in the event thatthe liquid column should be above or below the 40,000 curve, the speed of the compressor'A should be reducedxor increased-accordingly in order to bring the liquid columnto the proper point on the fluid volume scale.

I claim:- i

1. In a volume regulator gauge for compressors, an adjustable frame pivoted at one end to the support of said gauge, a plate forming a fluid Volume scale calibrated in fluid volumes under standard conditions inserted in said frame, indicating means adapted to be controlled by variations inthe intake pressure of the compressor adapted to cooperate withsaid' fluid volume scaleffor-indi cating the fluid volume supplied toithe compressor, and means for oscillating the said adjustable frameabout its. pivot to adjust the said scale to the said indicating means for changes in barometric conditions.

2; In a volume regulator gauge for com-; pressors, an adjustableframe pivoted at one endvto the support of said gauge, 'a flat plate trolled by variations in the "intake pressure of the compressorand adapted to'cooperate vwith the fluid volume scale for indicating the fluid volume supplied to the compressor; v 3.,In a volume regulator gauge for compressors, a frame pivoted atone end to the supportof said gauge, a flat plate forming a fluid volume scale calibrated in fluidlvolumes under standard conditions inserted in the said frame, a flat stationary barometric scale member, a flat temperature scale member slidable adjacent the barometric scale member, means for manually adjusting the fluid volume scale with respect to. thetemperature scale member, means for manually adjusting the temperature scale member with respect to the barometric scale member, and

indicating means adapted to be controlled by variations in the intake pressure of the compressor adapted to cooperate with said fluid volume scale' for indicating the fluid volumesupplied to-the compressor.

4. In a volumeregulator gauge for compressors, .a support, a frame having a fluid volume scale calibrated m'fluld'volumes under standard conditions pivoted,tosaidsupport, a stationary barometric scale member, 7

respect to said'barometric scale, means for ad usting sald fluld Volume scale relatlve to said temperature scale member, and a tube for containing a liquid column said liquid column being adapted to be controlled by variations in the intake pressure of the comfluid volume scale for indicating the fluid Volume supplied to the compressor.

In testimony whereof I have signed this specification. Y

a temperature scale member adjustable with pressor and adapted to cooperate with said V PA L HOFFMAN. 

